What is best: using something like the Ultra-noc (aluminum) or just a nylon loop? Or is it strictly preference? Thanks for the help.

The aluminum style loops can do damage to the string due to the fact they have to be screwed firmly down squashing the string.

Leave the metal loops on the shelf. They add a lot of extra weight to the string, they are noisy when attaching your release, they are noisy when you pull the trigger, there are four more screws to come loose at the moment you don't need them to, metal to metal contact between the release and the metal loop will wear out the release jaws faster.

i use just a little nylon loop and it works great. I was told if i went to an ultra nock i would have to change the nocks on my arrows and i would also lose more speed. Everyone has their own ideas but i like my loop.

I tried the metal ones alone they will mess up the string and are noisy

I tried the metal nock too, a couple of years ago, but I was using a scott mongoose release and I had the release hang up on the nock when released a couple of different times. Talk about getting your attention, pull the trigger and nothing happens until about the time you wonder WTF, it would release. Luckfully, both times I was acutally pointing my bow down slightly so the arrow didn't just go sailing into my neighbors yard[] Thast was it for me, been using a string loop ever since.

Thanks for the help. I'm gonna go with the nylon cord or rope.

Tie it on. Just make sure you do it correctly and have the knots going in different directions around the string.

I always just shot off the string. Everyone of my friends does the same. What is the purpose of the loop?

Use a string loop, stay away from the aluminum type.